Dynamics of a Spin-Boson System : How Does the Dynamic Compensation Manifest Itself : Condensed Matter and Statis tical Physics
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概要
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We study the non-adiabatic effect of the bosonic bath on the spin dynamics by the light of the dynamic compensation theorem. We examine the time-evolutions of the probability of finding the up-state of spin and the thermal average of σ_z(t). The dynamics is formulated in competition between the tunneling coherence of spin and the non-adiabatic effect of bath in the equitable treatment. We prove the complete compensation of the infrared divergences due to the zero-point and thermodynamic fluctuations by the dynamical fluctuation of the coherent boson (the dynamic compensation). We further present the exact expressions of the above two quantities in the series form.
- 理論物理学刊行会の論文
- 1991-02-25
著者
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都築 俊夫
東北大理
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TSUZUKI Toshio
Department of Physics, Tohoku University
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Tsuzuki Toshio
Department Of Physics Faculty Of Science Kyushu University
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